* nis/nis_call.c: Minor cleanups throughout.

	(rec_dirsearch) [HIGHER_NAME]: Correctly size ndomain array.
	(first_shoot): Add search_parent_first parameter.  Only if it is set
	search parent server first.
	If directory for table found through cold start cache is not the same
	as referenced in the cache, don't use it.
	(__nisfind_server): Take additional parameter.  Pass it on to
	first_shoot.
	(__prepare_niscall): Adjust __nisfind_server call.
	* nis/rpcsvc/nislib.h: Adjust __nisfind_server prototype.
	* nis/nis_table.c: Adjust __nisfind_server call.
	* nis/nis_lookup.c: Likewise.
	(nis_lookup): Don't loop endlessly if name is reduced to ".".

4 files changed, 40 insertions, 21 deletions

diff --git a/nis/nis_call.c b/nis/nis_call.c
index f8f00d8..bad1f77 100644
--- a/nis/nis_call.c
+++ b/nis/nis_call.c
@@ -38,12 +38,12 @@ static const struct timeval UDPTIMEOUT = {5, 0};
 extern u_short __pmap_getnisport (struct sockaddr_in *address, u_long program,
 				  u_long version, u_int protocol);
 
-unsigned long
+unsigned long int
 inetstr2int (const char *str)
 {
   size_t j = 0;
   for (size_t i = 0; str[i] != '\0'; ++i)
-    if (str[i] == '.' && ++j == 4)
+    if (str[i] == '.' && __builtin_expect (++j == 4, 0))
       {
 	char buffer[i + 1];
 	buffer[i] = '\0';
@@ -68,8 +68,6 @@ libnsl_hidden_def (__nisbind_destroy)
 nis_error
 __nisbind_next (dir_binding *bind)
 {
-  u_int j;
-
   if (bind->clnt != NULL)
     {
       if (bind->use_auth)
@@ -81,7 +79,7 @@ __nisbind_next (dir_binding *bind)
   if (bind->trys >= bind->server_len)
     return NIS_FAIL;
 
-  for (j = bind->current_ep + 1;
+  for (u_int j = bind->current_ep + 1;
        j < bind->server_val[bind->server_used].ep.ep_len; ++j)
     if (strcmp (bind->server_val[bind->server_used].ep.ep_val[j].family,
 		"inet") == 0)
@@ -96,7 +94,7 @@ __nisbind_next (dir_binding *bind)
   if (bind->server_used >= bind->server_len)
     bind->server_used = 0;
 
-  for (j = 0; j < bind->server_val[bind->server_used].ep.ep_len; ++j)
+  for (u_int j = 0; j < bind->server_val[bind->server_used].ep.ep_len; ++j)
     if (strcmp (bind->server_val[bind->server_used].ep.ep_val[j].family,
 		"inet") == 0)
       if (bind->server_val[bind->server_used].ep.ep_val[j].proto[0] == '-')
@@ -125,7 +123,7 @@ __nisbind_connect (dir_binding *dbp)
   dbp->addr.sin_addr.s_addr =
     inetstr2int (serv->ep.ep_val[dbp->current_ep].uaddr);
 
-  if (dbp->addr.sin_addr.s_addr == 0)
+  if (dbp->addr.sin_addr.s_addr == INADDR_NONE)
     return NIS_FAIL;
 
   /* Check, if the host is online and rpc.nisd is running. Much faster
@@ -340,7 +338,7 @@ rec_dirsearch (const_nis_name name, directory_obj *dir, nis_error *status)
     case HIGHER_NAME:
       { /* We need data from a parent domain */
 	directory_obj *obj;
-	char ndomain [strlen (name) + 3];
+	char ndomain[strlen (dir->do_name) + 3];
 
 	nis_domain_of_r (dir->do_name, ndomain, sizeof (ndomain));
 
@@ -461,31 +459,44 @@ rec_dirsearch (const_nis_name name, directory_obj *dir, nis_error *status)
 /* We try to query the current server for the searched object,
    maybe he know about it ? */
 static directory_obj *
-first_shoot (const_nis_name name, directory_obj *dir)
+first_shoot (const_nis_name name, int search_parent_first, directory_obj *dir)
 {
   directory_obj *obj = NULL;
   fd_result *fd_res;
   XDR xdrs;
   char domain[strlen (name) + 3];
 
+#if 0
   if (nis_dir_cmp (name, dir->do_name) == SAME_NAME)
     return dir;
+#endif
 
-  nis_domain_of_r (name, domain, sizeof (domain));
+  const char *search_name = name;
+  if (search_parent_first)
+    {
+      nis_domain_of_r (name, domain, sizeof (domain));
+      search_name = domain;
+    }
 
-  if (nis_dir_cmp (domain, dir->do_name) == SAME_NAME)
+  if (nis_dir_cmp (search_name, dir->do_name) == SAME_NAME)
     return dir;
 
-  fd_res = __nis_finddirectory (dir, domain);
+  fd_res = __nis_finddirectory (dir, search_name);
   if (fd_res == NULL)
     return NULL;
   if (fd_res->status == NIS_SUCCESS
       && (obj = calloc (1, sizeof (directory_obj))) != NULL)
     {
-      xdrmem_create(&xdrs, fd_res->dir_data.dir_data_val,
-		    fd_res->dir_data.dir_data_len, XDR_DECODE);
+      xdrmem_create (&xdrs, fd_res->dir_data.dir_data_val,
+		     fd_res->dir_data.dir_data_len, XDR_DECODE);
       _xdr_directory_obj (&xdrs, obj);
       xdr_destroy (&xdrs);
+
+      if (strcmp (dir->do_name, obj->do_name) != 0)
+	{
+	  nis_free_directory (obj);
+	  obj = NULL;
+	}
     }
 
   __free_fdresult (fd_res);
@@ -497,7 +508,8 @@ first_shoot (const_nis_name name, directory_obj *dir)
 }
 
 nis_error
-__nisfind_server (const_nis_name name, directory_obj **dir)
+__nisfind_server (const_nis_name name, int search_parent_first,
+		  directory_obj **dir)
 {
   if (name == NULL)
     return NIS_BADNAME;
@@ -520,7 +532,7 @@ __nisfind_server (const_nis_name name, directory_obj **dir)
 	return NIS_UNAVAIL;
 
       /* Try at first, if servers in "dir" know our object */
-      obj = first_shoot (name, *dir);
+      obj = first_shoot (name, search_parent_first, *dir);
       if (obj == NULL)
 	{
 	  obj = rec_dirsearch (name, *dir, &status);
@@ -539,7 +551,7 @@ nis_error
 __prepare_niscall (const_nis_name name, directory_obj **dirp,
 		   dir_binding *bptrp, unsigned int flags)
 {
-  nis_error retcode = __nisfind_server (name, dirp);
+  nis_error retcode = __nisfind_server (name, 1, dirp);
   if (__builtin_expect (retcode != NIS_SUCCESS, 0))
     return retcode;
 
diff --git a/nis/nis_lookup.c b/nis/nis_lookup.c
index c198376..839ee4e 100644
--- a/nis/nis_lookup.c
+++ b/nis/nis_lookup.c
@@ -127,7 +127,7 @@ nis_lookup (const_nis_name name, const unsigned int flags)
 			/* Otherwise __nisfind_server will not do anything.  */
 			dir = NULL;
 
-			if (__nisfind_server (req.ns_name, &dir)
+			if (__nisfind_server (req.ns_name, 1, &dir)
 			    != NIS_SUCCESS)
 			  goto out;
 
@@ -147,6 +147,11 @@ nis_lookup (const_nis_name name, const unsigned int flags)
 			  nis_domain_of_r (req.ns_name, ndomain,
 					   sizeof (ndomain));
 			  req.ns_name = strdupa (ndomain);
+			  if (strcmp (ndomain, ".") == 0)
+			    {
+			      NIS_RES_STATUS (res) = NIS_NAMEUNREACHABLE;
+			      goto out;
+			    }
 
 			  __nisbind_destroy (&bptr);
 			  nis_free_directory (dir);
diff --git a/nis/nis_table.c b/nis/nis_table.c
index 3213035..a92a4b6 100644
--- a/nis/nis_table.c
+++ b/nis/nis_table.c
@@ -271,7 +271,8 @@ nis_list (const_nis_name name, unsigned int flags,
 
       memset (res, '\0', sizeof (nis_result));
 
-      status = __nisfind_server (ibreq->ibr_name, &dir);
+      status = __nisfind_server (ibreq->ibr_name,
+				 ibreq->ibr_srch.ibr_srch_val != NULL, &dir);
       if (status != NIS_SUCCESS)
 	{
           NIS_RES_STATUS (res) = status;
diff --git a/nis/rpcsvc/nislib.h b/nis/rpcsvc/nislib.h
index a55de61..c993bac 100644
--- a/nis/rpcsvc/nislib.h
+++ b/nis/rpcsvc/nislib.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
 
@@ -276,7 +276,8 @@ extern nis_error __nisbind_create (dir_binding *, const nis_server *,
 extern nis_error __nisbind_connect (dir_binding *) __THROW;
 extern nis_error __nisbind_next (dir_binding *) __THROW;
 extern void __nisbind_destroy (dir_binding *) __THROW;
-extern nis_error __nisfind_server (const_nis_name, directory_obj **) __THROW;
+extern nis_error __nisfind_server (const_nis_name, int, directory_obj **)
+     __THROW;
 
 #endif